From: Patrick Cotner <patrick@...>
Date: 2007-09-04T05:27:15+09:00
Subject: array of hashes: finding hash with min value for key

I'm trying to write a proggy to help me figure out how long it will take
to pay off a credit card based on a payment value.
The card can have multiple sections with different owed amounts and
aprs.
Since the credit card companies pay off lower interest sections prior to
higher, I need to be able to determine which section has lowest apr. For
example

<code>
sections << { :type => "Purchases", :owed => 840.64, :apr => 0.2474 }
sections << { :type => "Transfers", :owed => 3453.45, :apr => 0.1774 }

</code>

I've set up a loop to iterate through each section and apply a finance
charge to the owed amounts.  I have a variable with my payment amount.
After applying the finance charge, i need to see if section[:apr] is the
lowest of all sections, in order to apply the payment to that section
only.
How would this be done?

-Patrick
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